For full disclosure purposes, if I seem anal it is due to one of two reasons.
1) I perceive an attempt from someone to be disingenuous in some capacity (admittedly not always an accurate assessment).
2) There is a disconnect between what I think a person is saying and what they are actually trying to say.
I have found the second reason is most prevalent and sometimes take effort to realize, but I usually pick up fairly quickly the first.
I do my very best not to allow my emotions to get involved in my posts. While I am not always successful, I normally succeed. When emotions flair up, rational dialogue suffers and no one learns anything except how to use sarcasm with each other and that never accomplishes anything good. But, I do understand the occasional snarky comment just because its fun.
So, if I appear overly anal or obtuse, I ask everyone to understand it is not intentional in most cases.